Simulation optimization and experiment of parameters for maize straw chopping and returning machine
In response to the problem of excessive straw crushing length in existing maize straw chopping and retur-ning machines,and the problem of clogging of the furrow opener in subsequent no-tillage seeding operation.Using the orthogonal experimental design method,combined with multibody dynamics software RecurDyn and field experi-ments,the straw crushing length was used as the indicators,and the moving speed of the implement,rotation speed of the eccentric wheel,and the length of the cutting rod were used as the experimental indicators.The L27(313)or-thogonal table was used to simulate the experimental results of each scheme through virtual simulation testing method.Through range analysis and variance analysis of the experimental results,the optimal parameter combination was de-termined to be a rotation speed of the eccentric wheel of 700 r·min-1,a implement movement speed of 3 km·h-1,and a cutter rod length of 200 mm.Field repeated experiments showed that under the optimal parameter combination conditions,the straw crushing length reached 49.2 mm,which is 1.5 mm longer than the straw crushing length of 47.7 mm obtained from virtual simulation experiments.The results of field experiments and simulation experiments are highly consistent,and this research achievement can provide reference for the design of similar types of maize straw chopping and returning machines.
NETL
NSTL
万方数据
